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idr: Add new function idr_is_empty()

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Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
This commit is contained in:
Andreas Gruenbacher 2011-08-08 23:36:56 +02:00 committed by Philipp Reisner
parent 8e22943430
commit 05f7a7d6a7
2 changed files with 11 additions and 0 deletions
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1
include/linux/idr.h
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@ -85,6 +85,7 @@ void idr_remove(struct idr *idp, int id);
void idr_free(struct idr *idp, int id);
void idr_destroy(struct idr *idp);
void idr_init(struct idr *idp);
bool idr_is_empty(struct idr *idp);
/**
* idr_preload_end - end preload section started with idr_preload()

10
lib/idr.c
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@ -869,6 +869,16 @@ void idr_init(struct idr *idp)
}
EXPORT_SYMBOL(idr_init);
static int idr_has_entry(int id, void *p, void *data)
{
return 1;
}
bool idr_is_empty(struct idr *idp)
{
return !idr_for_each(idp, idr_has_entry, NULL);
}
EXPORT_SYMBOL(idr_is_empty);
/**
* DOC: IDA description